Two vectors m and n are defined by 3i+4j and n=2i-j. find the angle between m and n

asked Feb 12, 2022 31.7k views

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Answer:

${ \ttm.n = } \\ { \tt{ (3 * 2) + (4 * - 1) = (5)( √(5)) \cos( \theta) }} \\ { \tt{ \cos( \theta) = (0.4)/( √(5) ) }} \\ \theta = 79.7 \degree$

Steven Wexler answered Feb 17, 2022

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